Quercus tenuiloba C.H.Mull.

Mexico (Nuevo Leon); 1400-2000 m;

tall tree;

12-18 x 3.5-5.5 cm; deciduous; lanceolate; apex acuminate aristate; base mostly rounded, or slightly cordate; hairless above; hairless beneath except axil tufts and hairs on midrib; margin cartilaginous, slightly revolute, wavy, superficially dentate with bristle-tips to 4-8 mm long, sinuses rounded; 10-12 pairs of lateral veins slightly impressed above, raised abaxially, at an angle of 40° with the midrib; petiole depressed, 1-2.2 cm long;

female catkin 6-8 cm long, bearing 2 flowers; stigmas very long;

acorn maturing in 2 years; cup rounded, with tomentose, oval, appressed scales;

– A.Camus : tome 3, p. 259, n° 391; – Sub-genus Quercus, section Lobatae, Series Erythromexicanae, Group Acutifoliae; – For today’s Mexican Authors (Silvia Romero Rangel, 2006), this species is a synonym of Q.xalapensis.